In this study, impact of Static VAr Compensator (SVC) on power flow control is studied by
statistical indices. For this purpose, several conventional branches of SVC are introduced and their impacts are
discuses on active and reactive powers flow control on power systems. Peak and least values used as decision
criteria. To compare and discuss the capability of compared SVCs, two statistical indices are used; i.e. Absolute
Percentage Error (APE) and Symmetric Mean Absolute Percentage Error (SMAPE). These indices help to result
in analysis and extract novel aspect of behavior of SVCs. Simulations have been carried out in
MATLAB/SIMULINK environment. In this study, first a general review on lectures about SVC has been done
which has four parts; i.e. design, placement, application and modeling, respectively. Then, the most useful
branch is chosen.